#include <iostream>
#include <string>
using namespace std;
int main()
{
const int USER=201701;
const string PSW="Computer2020@sina.com";
int user;
string psw;
cout <<"用户名：";
cin>>user;
cout <<"密码：";
cin>>psw;
if(user==USER&&psw==PSW)
cout <<"亲爱的小朋友，欢迎你！"<<endl;
else
cout <<"用户名或密码不正确！";
return 0; 	
}
